604449 external_news 1522338343 1522787118 3-D printers deposit molten plastic layer upon layer, cranking out toys, guns, artificial limbs, and countless other objects.The surging market has made desktop versions affordable for schools and librariers. But these smaller versions come with a cost. Printers emit volatile organic compounds (VOCs) and other particles. Rodney Weber of the School of Earth and Atmospheric Sciences comments on the data about these emissions.

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